non root user and fix book/html calibre (#856)

* non root user and fix book/html calibre

* version bump

* Update docker-compose-latest.yml

* remove customApp

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Co-authored-by: systo <systo@host.docker.internal>

src/main/resources/templates/convert/pdf-to-book.html

@@ -32,10 +32,8 @@
                     <option value="lrf">LRF</option>
                   </select>
                 </div>
-                <br>
                 <button type="submit" id="submitBtn" class="btn btn-primary" th:text="#{PDFToBook.submit}"></button>
               </form>
-              <p class="mt-3" th:text="#{PDFToBook.help}"></p>
               <p class="mt-3" th:text="#{PDFToBook.credit}"></p>
             </div>
           </div>